Event based scheduling and USB.

[Takanori Watanabe]

In message <4CC7DB2A.2090601 at FreeBSD.org>, Alexander Motin wrote:
>Takanori Watanabe wrote:
>> In message <4CC732C7.50409 at FreeBSD.org>, Alexander Motin wrote:
>>> Most likely you should be able to avoid interrupt sharing using some
>>> additional HPET options, described at hpet(4).
>> 
>> Try to disable using shared IRQ with uhci, the IRQ used by HPET become cpu: 
>> interrupt and certainly load average goes quite low, 
>
>If you mean "cpuX:timer" - then probably you did something wrong and
>system fallen back to LAPIC timer.

Hmm, I restrict the HPET IRQ by setting hint.hpet.X.allowed_irqs
kenv value to 0xff000000 to avoid using shared IRQ (IRQ20).